PAUL, make a video on doing various RF measurements for Duplexers, Multiplexers, Diplexers and the theory behind the differences between a duplexer and diplexers are
Even though you may never hit the high end of the frequency capability, the increased bandwidth gives a better flatness with the measurements across the frequencies you actually use. ☮ brother.
Nope, that is a fallacy, the apperend flatness comes because of the limited number of scan points. the TinySA draws a line between them. Unfortunately, the wider your scan and the more space between scan points also means that you might be missing signals that fall between the scan points, Keep the span as small as posible for best results. Use the multi band mode for signals you suspect to be in certain areas if you have to do a wider scan.
Cool little toy... Sadly beyond my spectrum, both financially and signal-wise, as I usually deal with LF stuff. 😁 But I like learning something new every day... So thumbs up! 👍🏻💪🏻🙋🏼♂️
I've been a hard-core LowFER, and like to play around at still lower freqs, such as 9 kHz. It would be very good if the Ultra worked down there. Not sure why it doesn't. It's not like the components were expensive. But perhaps they are physically to large. I have an Ultra for convenience on the frequencies it covers. I also have an HP SA that goes down to 20 Hz, but it runs on AC, and it weighs 90 lbs. When I set up my workbench I had to ask a friend to come over and hoist it onto my bench for me. That makes it very hard for an old man to use with outdoor antennas and preamps and feed-lines, looking for local noise sources, playing around getting WWVB as clean as possible, and devising very low frequency tracker modules. There is just so much fun to be had, and so many interesting things that can be home-brewed at the extremely low frequencies, like long-range metal detectors for instance. So if Erik Kaashoek came out with a TinySA version that went down to the low end of the audio spectrum, and even if it only went up to about 500 kHz I'd buy one in a heartbeat. I could try building a down-converter for the TinySA, but as you probably know, based on your comment, when you get down in the RF weeds you pick up all sorts of unusual internal and external hums and noises, and AM radio station broadcasts that if you don't fully grasp all of the physics involved you can find yourself just chasing your tail forever. It would be nice to have a handheld piece of gear that was designed to minimize as much of that as is reasonable and still provide good, accurate measurements like the TinySA does. RF near DC is far trickier than microwave stuff, and getting a clean signal out of gear that weighs less than 100 pounds is a real challenge.
@@johnwest7993 Its a matter of LO supression. However I had good results down to about 15Khz with the low frequency spectrum analyser converter from BG7TBL and the tinySA. You can use the tiny to syncronize with the GPS input of the converter but have to install a 35db 10Mhz amplifier between the calibration output and the converter, then set the calibration output to 10Mhz.
@@PappaBear_yt, well, you're correct in that LF includes the audio range. I just like to radiate it as electromagnetic waves, more often than acoustic. But I've been known to do both.
Who would have ever thought that there would be a spectrum analyzer (which is also a signal generator) that you can fit into your shirt pocket? And, in your OTHER pocket, you can fit a NanoVNA. The genuine non counterfeit ones, they have them at R&L Electronics right here in Ohio. 73 DE W8LV BILL
Hey Paul, a group of RUclips ham radio creators and viewers are meeting at the Hamvention flagpole at noon on Saturday. It would be great if you could join us.
PAUL, make a video on doing various RF measurements for Duplexers, Multiplexers, Diplexers and the theory behind the differences between a duplexer and diplexers are
My favorite toy at work was the HP8566, and yes you could listen to radio stations.
Even though you may never hit the high end of the frequency capability, the increased bandwidth gives a better flatness with the measurements across the frequencies you actually use. ☮ brother.
Nope, that is a fallacy, the apperend flatness comes because of the limited number of scan points. the TinySA draws a line between them. Unfortunately, the wider your scan and the more space between scan points also means that you might be missing signals that fall between the scan points, Keep the span as small as posible for best results. Use the multi band mode for signals you suspect to be in certain areas if you have to do a wider scan.
@@germanjohn5626
Perhaps I should have mentioned the frequency response of the circuit itself.
Didn't picture you with a short goatee. Beware shiny things !
Cool little toy... Sadly beyond my spectrum, both financially and signal-wise, as I usually deal with LF stuff. 😁 But I like learning something new every day... So thumbs up! 👍🏻💪🏻🙋🏼♂️
I've been a hard-core LowFER, and like to play around at still lower freqs, such as 9 kHz. It would be very good if the Ultra worked down there. Not sure why it doesn't. It's not like the components were expensive. But perhaps they are physically to large. I have an Ultra for convenience on the frequencies it covers. I also have an HP SA that goes down to 20 Hz, but it runs on AC, and it weighs 90 lbs. When I set up my workbench I had to ask a friend to come over and hoist it onto my bench for me. That makes it very hard for an old man to use with outdoor antennas and preamps and feed-lines, looking for local noise sources, playing around getting WWVB as clean as possible, and devising very low frequency tracker modules. There is just so much fun to be had, and so many interesting things that can be home-brewed at the extremely low frequencies, like long-range metal detectors for instance. So if Erik Kaashoek came out with a TinySA version that went down to the low end of the audio spectrum, and even if it only went up to about 500 kHz I'd buy one in a heartbeat. I could try building a down-converter for the TinySA, but as you probably know, based on your comment, when you get down in the RF weeds you pick up all sorts of unusual internal and external hums and noises, and AM radio station broadcasts that if you don't fully grasp all of the physics involved you can find yourself just chasing your tail forever. It would be nice to have a handheld piece of gear that was designed to minimize as much of that as is reasonable and still provide good, accurate measurements like the TinySA does. RF near DC is far trickier than microwave stuff, and getting a clean signal out of gear that weighs less than 100 pounds is a real challenge.
@@johnwest7993 Uhm,... I meant LF as in "audio". 🤭 Sorry for misunderstanding!
@@johnwest7993 Its a matter of LO supression. However I had good results down to about 15Khz with the low frequency spectrum analyser converter from BG7TBL and the tinySA. You can use the tiny to syncronize with the GPS input of the converter but have to install a 35db 10Mhz amplifier between the calibration output and the converter, then set the calibration output to 10Mhz.
@@germanjohn5626, thanks. I may give it a try.
@@PappaBear_yt, well, you're correct in that LF includes the audio range. I just like to radiate it as electromagnetic waves, more often than acoustic. But I've been known to do both.
Who would have ever thought that there would be a spectrum analyzer (which is also a signal generator) that you can fit into your shirt pocket? And, in your OTHER pocket, you can fit a NanoVNA. The genuine non counterfeit ones, they have them at R&L Electronics right here in Ohio. 73 DE W8LV BILL
Yes, it's easy to mix up all those fundamentals of them darn harmonics.
Btw, my TinySA Ultra is on it's way from AliExpress as we speak.
"Sorry about the reflectiojns"
Polarization filter for your camera?
what use can this spectrum analyzer be at or below 3mhz?? I know of nothing that transmits at say 1000mhz or even 100khz
Hey Paul, a group of RUclips ham radio creators and viewers are meeting at the Hamvention flagpole at noon on Saturday. It would be great if you could join us.
Thank you for the invitation. I will look for you all.
🥹🥹🥹🤨🤨🤨🤨🤨🤨🤨😭😭😭 granny